You are to implement the Currency Converter as a GUI interface, see screenshot below. You are required to use Windows Forms, rather than other GUI technologies such as WPF, XNA, web pages etc. Also to keep this program relatively simple, do not use advanced techniques such as MVC or layered architectures. (If you do not know what these acronyms mean, that's fine. Just ignore them.)
You are also required to develop your GUI layout that is similar to the screenshot below. You are not expected to have the locations and size of each control correct to the last pixel, however the relative position of the controls is to be maintained.